Change-speed gearing.



IHIIIIIIIIIIII GRANGE sPBBDf'GBARING. APPLICATION IILED #PIL 29, 1904.

EATENTED MAE. A2o, 1906. E. soLLEE E E. 'EOTTINGEEE CHANGE SPEED GEEEING. APPLICATION' FI'LED APR. 29, 1904.

2 lSHEETS-SHEET 2.`

MTE si@ EUGEN soLLEa orsi-isnt, AND rninnRicH HOTTINGER. 'or' BERNE. r SWITZERLAND. y

cHANeE-sPEeDGEAame.

Specification iof Letters atent.

Appunti@ ined April 29. 1904. serial No. mi/t.

oaZZ whom it may concern:- Y

Be it known that we, EUGENSOLLER, re-

siding at Basel, and FRIEDRioH HOTTINGER,

Qresidmg at Berne, Switzerland, citizens ol the Republic of Switzerland, have lnve'nted certain new and useful Improvements in Change-` Speed Gearing, of which the Afollowing.; is a specification.

This invention vrelates toa change-speed gear, more particularly for use with motorcars, comprising a number of spur-wheels loosely mounted on the driving and driven spindles and capable of being secured to theml byrneans of adjustable' clutches, the number and sizesof the, said wheelsdepending upon thevnurnber of speeds desired, as Well as upon the speed'ratios. Each spurwhecl on the driving-spindle always engages with a spur-wheel on the driven spindle, so that the speed ratio of each pair of engaging wheels is constant. The corresponding coupwith a modied construction thereof.

Figure 1 shows a front elevation; Fig. 2, a partly-sectional plan view; Fig. 3, a crosssection on line AB C D, nd Fig. 4 a crosssection on line G H E Fgof Fig. `2. Fig. 5 shows part of the front elevation, and Fig. 6 par-t of the side elevation on an enlarged scale. Fig. 7is a diagrammaticview showing a modified arrangement of part et kthe mechanism. i

in the iront wallsofa lcasing g arevmou'ntedI two parallel driving and driven shaft-s a and Sb, respcctivcly-` Or .each oii'thesejtwo shafts aremounted loose six'spunwheels '1' to 6A and 1 tol 6 of varying sizes, thejspur-wheel of, one shaft being always -lii vengagement with f that of theater-Sima having desmendeX-that Yis to slay', lthe'wheell '2f engages with twelve wheclsareprovidedyon jone' side with projections, forming. parts'y offclutches,y said projecting and partly as a reen-A hand side and on the next one on the same shaft-on the left-hand side, on the vthird one again on. the right-hand side., and soon. The otherside of the hub is plain. Between the projections of each two adjoining spurwheels `are mounted coupling-clutches 'c' c c" andd d d", provided with correspond- 4ing projections onvboth sides and mounted on the Shaft so that they cannot rotate,` l They clutches care slightly wider than the clutchesV d, or the projections of the former are sli htly but areflongitudin'ally movable on it.

longer than `those of the latter. Each c utch is engaged by a forkf, pivoted on two arms e;

The four arms e for the clutches c and d orK c, and d or c" and d" are secured to'one andthe same crank-shaft h orv h or 7amthat is to say, (see Fig. 3,) the clutches; say

0" and d, are secured to h-'so that the correspondingclutches are thus operated simultaneously, the coupling-clutches c, owing to their :longer projections, engaging with one or the other ofthe spur-wheels slightly earlier than the clutches y l To the outer ends ci the crank-shafts h h h" are secured cranks k 7c k", which are Patentedmarcheo, 190e.,

provided neartheir free ends with roller-carrying pins i. v in grooves of toothed cams n n n" of the same size which 'engage always with one another. The grooves of the three cams rn/ n n are endless, being circular along twothirds of the circumference', (two hundred and forty degrees,) while on one-sixth of the circumference (sixty degrees) they form a projecting angle, an 'on the remaining sixth a The rollers in question engage j rentering angle, as canbe seen in Fig. 1. v

The three cams are so arranged with reference to their different direction 'of rotation vthat during a complete revolution in the dil .95 cranks are in turn moved iirstfrorn 'the central position into the left-hand-end position rection-of the arrow, Fig. 1, `all tlie threel and then into the right-hand-end position, the corresponding pairs [of clutches being shittedin turn iirst also tothe left hand and then tothe. right hand-that is to say, only `onefcliitchon the shaft a and one on `the, lshaft?)v are operated, but never several pairs of; clutches together.

To the etensionof the hub is secured a toothed wheel m4 withwhichiem.

erases.

be fixed, h' means of a pawl, in twelve positions on a racket w, provided with a corresponding 4number of recesses or notches of unequal depth.' The distance between each two recesses or notches l II-Vl for the pawl 'andr the ratio between the toothed segment o and the toothed wheel' lm are calculated so that when the hand-lever p is turned through a portion corresponding to the said distance the cams are turned through an angle of sixty degrees. The shallower projections on the 'bracket w serve for ixing the lever in positions corresponding to those positions o' the three cams in which the rollers on all the three cranks lc c c are in the circular portion of the cam-grooves or at a point situated at the same distance from the center as the grooves in question.

in order to eiect the change of a high to' a much lower speed, or vice versa, leaving out those in between-s21y from the second speed.

on to the iithwthe three cam-disks are mounted so -as to be longitudinally adjust- ,of the spur-wheel i".

able on their journals. Against the centers oit' the inner sides of the two outer cams rest forks s, mounted on a spindle t, which can be actuated by means of a pedal u and lever o. Gn the said spindle are also mounted three pairs of lugs tor the urpose of fixing between thern the free en s of the cranks le le" c", so as to prevent them from swinging laterally while the rollers are out of engagement with the grooves of the cam-disks. The hubs of the three cams are connected together by a cross-bar yin such manner that they can only be moved all together and in such manner asto alwaysremain parallel to their n'ormal position and all in one plane. On the journals of the two outer cams n and n" are mounted helical s rings z' for the purpose of always returning t e cross-bar y and the cams to their normal position.

The manipulation and the working of the change-s eed gear described during driving are as fol ws: After disenga ing the pawl the hand-lever p is swung to tlie right-say so far as to bring it to engage with the notch marked of the quadrant w. In this swinging movement the toothed segment o particiates engaging with the toothed wheel in, heresult'is that the cam-disks are turned to a corresponding extent in the direction indicated by the arrow, Fig. l. During this movement the crank k', the roller or which engages with the groove of the cam n, will be operatedirst, for the rollers' of the cranks 7c and lc, are still in the circular portion of the rooves of thecams n and n". The crank 'therefore will only be slightly moved to the teit, the result being thatrst the clutch c willyengage with the projection oi the spurwheel l', and a moinont later the clutch d will come into eneagement with the projections :is soon as the clutch c has been thrown into gear, 1,and therefore 1, also willdicgin to participate in the rotation, and at the next moment the u'ojections oi the latter can he engaged by t lose of the clutch d. After the coupling lms'hecn etlected the rotation of the shaft it will hc transmitted to the shaft b, which will have a speed in proportion to the ratio between thc s tir-.wheels l and l. .ltit is desired to t lrow into gear the next highest spoed, thou the hand-lever after its pawl has been disengaged is moved farther to thc right until thcy pawl engages with the notch li. rThis morcment causes the cams f/if to again turu through an angle of sixty degrees; but again only7 the movement of n results iu its couplings boing thrown into gear. Owing to the shape ol` the groove of a the roller engaging with it will 'pass over a point at the same distance from the center as 'the ,'fircular portion oll tho groove into a position situated nearer to thc center, the result of' this beingr the t the crank lc will pass from its lcft-hand-eud position over the central position lo thc right-hamlend position, which again results in the shilling o1 the clutches c and dl to thc right. l? or onel moment the couplingr is thrown couipl'etely out ol' geur, and thou lirst tho clutch c" will come into engagement with L aud immediately afterward d with 2". ll it he desired to change, say, from tho second speed direct to the sixth, the houd-lover p is ylirst turned until the pawl first cugagcs with the Shallower notch immediately l'ollowiug that on which it was hel'orc. Thou thc pedal lu is depressed and the shaft t turned to such au extent that the pairs of lugs J, mounted ou it, iix between them the troc cud oi ull the three cranks and the l'orks s press thc cams connected by the cross-har yy outward against the action of the helical spriugs's to such un extent that the rollers ol' lhc craulis /tH k" become disengaged from thc grooves ol` the cam-(ilisks, so that the latter become l'rccly rotatable. Then, audl not until thou, the hand-lever p is turned further to thcr right until the pawl engages with tlo lust ol' the shallow notches, whereupon thc. pcdol u is again released, thus releasingT thc. cranks. and the cams will return uudcl' thc ullucuco of thc action ol' the springs lo thcir uoruml position. The handlcvcr p is now liuully turned into its outermost position, the howl being brought into the notch Vl, the crank la alone being operated duringr that Inove- -ment, which will result iu the clutches c und TOC IIC

stesse used,-jfa'sshown 'in Fig. 7,"by-causing the pivotsf't-ot'tyvo adjacent cranks-i-or instance, 7c

,1o andzkfT-.to engage with the cam-groove of onel land `thes'ame disk'n. ln this case the` groove of both disks n andal would extend coneentgrically to three-quarters, e u al to two hundrediland` seventydegrees of t` e'rcircurn- Vi gdb-arouse;*andorln a `projecting anglefor oneeighth, equal' to'forty-ive degrees, and a reentering angle for one-.eighth of the'eiroum- 'ferenoew Fora whole `revolutionol the camdisltsallfour cranks are operated, and thezopentra-l diskin?"v need therefore haveno gehe-:groove relatively to the other disksfand a seriesrof .clutch-operating cranks engaging" grobvie`,'ffaszitfonly"serves Vthe purpose of an intermediategear-Wheel.

Whatfavelclairnlas our invention, and desire toseiiure'bylietters Patent, is-'- Y 1 25'- 1. In chan e-speed gearing, 'a driving .and a idnivelii'ushaI-t, `a -jplurality of gear-,wheels rnou'ntedloosely on said `shafts and' engaging togetherin pairs,A a oorrespondin series oi' airs ot'fooupling-,elutohes longitu inally ad- Y gqfgustableonboth shafts, rotatable disks geared together. andiea'eh provided With a. partlyconcentrie and partly projecting and rente'ring\.eam:-groovewith the-projecting and -reenteringparts arranged in a different partrof in saiydpam grooves, substantially' as set forthif y' ZwIn-ehaIIge-speed gearing, a driving and dna driven' shaft, a plurality of gear-Wheels i' mounted loeselyon'said shafts and engaglng together in" pairs, a correspondinr series of' pairs off'coupling-clutbhes longitudinally adjustablefonboth shafts, rotatable disks geared 452 togethernand each provided with a partlyconcentric and partlyprojeoting and reentering e'aln'fgroove' withv the `pro`eoting and-reentering' parts arranged'in a" ifferent part of -tl ejgroo-ve relatively tothe other disks, a seo'ie's-f'ofolutcheoperating cranks engaging in -v said `cani'-girooves, and ineansfor moving the rotatable dislrsvaxiallyfo'rigtheir spindles 'to calisethedise'n'ga enient and ree'ngageinent oi the "cranks vinrit e earn-grooves when it'is l 5 51'desir'ed 't'ochange from/onesp'eed to another,

substantially asset forth.

31' ln'-` oha'nge-,speed fgearing, a driving and a `driven?shaft, `a plurality of gear- Wheels 'mounted loosely on said shafts and engaging 'ovltogetheryin pairs, a corresponding series of pairs o :1"oupling-clutches longitudinally adjustable n b'oth shafts, rotatable disks geared togetherjand eachprdvifdediitlth a partly-y concentric' andfpartlyprojeciiiig'and reenter-` ingloanigroove 'with the projecting and re- 'a driven shaft, a plurality ol" gear-Wheels .ed for operation together, rotatable'disks Igearedtogether rand each provided 'with a' the groove relatively tothe other disks, a se'- `a driven shaft, a plurality of `gear-Wheels vided Awith engaging means for axially shift- 7o ing the'rotatable disks on their spindles and v crank-holding lugs, attached toy said shaft,

substantially as set forth. f

4. "ln change-speed gearing, a driving and mounted on said shafts and engaging together in pairs, a corresponding series of coupling-clutches arranged between eachv pair ofgear-'wheels 'on each shaft and longil tudinally adjustable on the said shaft, each 8o coupling-clutch being adapted to be engaged .with the gear-Wheel onvk either sideofit or to be free ofboth, andthe corresp'ondingclutohes` on the driving and driven shafts being adapt-f partly-concentric and partly projecting and" rentering cani-groove With the projectingl and rentering `parts varranged in a different partl of the groove relatively yto the other disks, and a series of clutch-operating cranks engaging in said cam-grooves, lsubstantially as set forth.

`5; In change-speed gearing, a driving and a-driven shaft, a plurality of gear-Wheels Inountedon said shafts andengaging together in pairs, a Corresp onlding series of couping-clutchesv arranged between leach pair of gear-Wheels on each shaft and longitudinally adjustable'on the said shaft, each coupling- 10o clutch being adapted to be engaged with the 4 gear-Wheel on either side of it or to be clear of i both', and the corresponding clutches on the driving and driven shafts being adapted for operation together, rotatable disks geared together 'and each provided with a partlyconcentric and partly projecting and reenter ing 'cam-groove With theprojecting and reentering parts arranged in adilferent part'of ries of.clutcl'i-operating cranks vengaging in said cam-grooves, and means for moving the rotatable disks a'Xially-on their spindlesto cause the disengagement and rengageinent of the cranks'in the earn-grooves W'hen it is desired to change from one speed to another, substantially as set forth.` y

6. In change-speed gearing a driving'and Inounted on said shafts, and engaging'together in pairs, a correspmiding `series olooupling clutches arranged between each pan' of gear-Wheels on each shaft andlongi- .tudinally adjustable 'on the said shaft, each coupling-clutch .being adapted to be engaged with the gear-Wheel on either side of it or to be free lof both, and the corresponding clutches on the driving and driven shafts being adapted for operation together, rotatable disks 'geared together and each provided ISO with a partly-concentric and partly projecting and rentering cam-groove with the projecting and rentering parts arranged 1n a. different part of the groove relatively to the other disks, a series of cluteh-operating cranks engaging in said cam-grooves, a pedal-operated shaft provided with engaging means for axially shifting the rotatable disks on their spindles, and crank-holding lugs attached to said shaft, substantially as set forth.

7. In change-speed gearing, a driving and a driven shaft, a plurality of gear-wheels mounted loosely on said shafts, and engaging together in pairs, a corresponding series of pairs of coupling-clutches longitudinally adjustable. on both shafts, rotatable disks gea rod together and each provided with a partlyconcentric and partly projecting and reentering cam-groove with the projecting and reentering parts arranged in a different part of the groove relatively to the other disks, a series of clutch-operating cranks engaging in said cam-grooves, and means for rotating the cam-disks to cause-the cams to operate the cranks consecutively whereby during a complete revolution of the cam-disks all the. cranks, and therefore, all the clutches, are operated in turn substantially asset forth.

8. In change-speed gearing, a driving and a driven shaft, a plurality ofv gear-wheels mounted on said shafts, and engaging together in pairs, a correspomling series of coupling clutches arranged 'between each pair of gear-wheels on each shaft, and longitudinally adjustable on the said shaft, each coupling-clutch being adapted to be engaged with the gear-wheel on either side of it or to be free of both and the corresponding clutches on the driving and driven shafts being adapted for opt-ration together. rotatable disks geared together and each provided with a part.ly-(amcentwic and partly projecting and rentering caa-groove witlh the projecting and rentering parts arranged in a different part .of the groove relatively to the other disks, a series of eluteh-operating cranks engaging in said cam-grooves., and means for rotating the cam-disks to cause the cams to operate the cranks eonsetiutively whereby during a complete revolution of thecam-disks all the cranks, and therefore all the clutches,

are operated in turn,substalltially asset forth.

t). In change-speed gearing, aidriving aml a driven shaft, a plurality ofgear-wheels mounted loosely on said shafts and engaging together in pairs, a corresponding series of pairs of coupling-clutches longitudinally adjustable on both shafts, the clutches on one shaft having-long projections and the clutches of the other s.al't having shorter projections, rotatable disks geared together and each provided with a partly'- concentric and partly projecting and, rentering cam-groovel with the projecting and rentering parts arranged in a different part of the groove relatively to the other disks, and a series of clutch-operating cranks engaging in said cam-grooves, substantially as set forth.

1t). ln change-speed gearing, a drivin and a driven shaft, a plurality of ear-w eels mounted on said shafts and engaglng together in pairs, a corresponding series of couplingclutches arranged between each pair of gearwheels on each shaft and longitudinally adjustable on the said shaft, each couplinglclutch being adapted to be engaged with the gear-wheels on elther side of it or to be free of both and the corresponding clutches on the driving and driven shafts being adapted for operation together, the clutches on onel sha ft having long projections and the clutches of the other shaft having shorter projections, rotatabler disks geared together and each providedwith a partly-concentric and partly projecting and rentering cam-groove with the projecting and rentering parts arranged in a different part of the groove relatively to the other disks and a series of clutch-operating cranks engaging in said cam-grooves, substantially as set forth.

l l. In change-speedgearing, a drivin and a driven shaft, a plurality of gear-w ieels mounted loosely on said shafts and engaging together in pairs, a corresjmmliny series of )airs of coupling-clutches longitudinally adjustable on both shafts, rotatable' disks geared together and each provided with a partly-concentric and partly projecting and rentering cam-groove with the projecting and reentering parts arranged in a different part of the groove relatively to the other disks, and a series of elutch-ojwrating cranks enga ring in pairs with each cam-groove to operate both of them at different times, substantially as set ft llll.

l2. ln change-speed gearing, a driving and a` driven shaft, a plurality of gear-wheels mounted loosely on said shafts and engaging together in pairs, a eorrespomling series of pairs of conpling-clutches longitudinally adjustable ,.iboth shafts, rotatabledisks geared together and each provided with a )artlyconcentric and partly projecting an rentering cam-groove with the projecting and reentering parts arranged in a different part of the groove relatively to the other disks, a series of clutch-operating crank-s engaging in pairs with each cam-groove to operate both of them at different times, and means for rotating the cam-disks to cause the cams to operate the cranks consecutively whereby duringr a complete revolution 'of the cam-disks all the cranks,` and therefore all the couplingclutches are operated in'turn, substantially asset forth.

I3. ln change-sprawl gearing, a driving and a driven shaft, a plurality of gear-wheels mounted on said shafts and engaging toget her in pairs, a corresponding seriesof coupling-clutches arranged between each pair of IXO 3o centric and part gear-Wheels on each shaft and longitudinally 'adjustable on the vsaid shaft, each coupling- ,clutch being adaplted to be engaged with the ear-Wheel on eit 1o cam-groove with the pro`ecting and reenter# iierent part of the.

mg parts arranged in a groove. relatively to the other disks, and a se ries ef-clutch-operating cranks engaging Ain A' parswith each cam-groove to operate'bothv 15 of them at difieren set 'ferth- '1.4,' In changwspeed gearing, a drivin and ycadrivenshaft, a plurality of gear-W eels `1'nc'mnted' on said shafts and engaging tozo etherin airs, 'a corresponding series of coup- "1 irigllto es arranged between each air of gear-Wheels on each shaft, and longitu inally ladjustable. .on the said shaft, each coupling# clutch being ada ted to be engaged With the 2 5 earwheel on eit er side of it or to be'ree of oth and the corresponding clutches on the A'drivingand driven shafts being adapted for v operation together, rotatable disks-geared togather yand each. lprovided with a. artly-eontimes, substantially as cam-grcove .With the pro 'ectlng and reenter- ,fing parts arranged in a iierent art of the `groove relative y-to thev other dis s, a series ci clutehfoperating cranks'engaging yin. pairs y er side of it or to be free ol4 f 5 oth and the corresponding clutches on the together in pairs, a correspondin y projecting an rentering with each cam-groove to operateboth of them f 3 5 at different times,

the cranks consecutively whereby during a and means for rotatingA the cam-disks to 'cause the cams to operate complete revolution of the camdisks all the cranks,

as set forth. 1 y

15. In change-speed gearing, a drivinU and a driven shaft, la plurality of, g'ear-wthe.els

mounted loosely on saidLshafts and engaging series of palrs of coupling-clutches longitu inally adjustable on both shafts, rotatable disks geared together and each provided With a partly-concentric andpartl projecting and rentering cam-groove-wit the projecting! and therefore all the coupling clutches, are operated in turn substantial y andI rentering parts arranged in a different part of the groove relatively to the other disks, a series of clutch-operating cranks engaging in said cam-groovesz a gear-Wheel on the shaft of one 'of the cam-dlsks and atoothed segment engaging therewith, va hand-lever therefor and a'notched sector for said hand- *lever substantially as set forth.

In testimonywhereof We have hereunto set our hands to this specification in' the presence of tw'o subscribing witnesses A A EUGEN soLLER. d

FRIEDRICH HOTTLNGER;

l`l/Vi'tnesses l ALBERT GRAETER,

' f GEO. GIFFORD. 

